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- Multi-Protocol Serial Support: Provides four independent serial ports configurable via software for RS-232, RS-422, or RS-485 communication modes.
- PCI Express 2.0 Compliance: Fully compliant with PCIe 2.0 x1 interface, ensuring high-speed data throughput and compatibility with modern embedded systems.
- High Data Rate Capability: Supports serial data rates from 4,800 bps up to 3 Mbps (RS-232 up to 921.6 Kbps), suitable for a wide range of industrial communication protocols.
- 16C550 Compatible UART: Incorporates 16C550-compatible UART controllers with 256-byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Flexible Connector Orientation: Available in two mechanical configurations—vertical (EGP2-X401-W1) and horizontal (EGP2-X401-W2)—to accommodate different system layouts.
- Full RS-232 Functionality: Supports all standard RS-232 control signals through DB9 connectors, ensuring compatibility with legacy and modern serial devices.
- Hardware Termination Control: DIP switch selectable termination resistors for RS-422/485 modes, allowing optimized signal integrity in various network topologies.
- Industrial-Grade Design: Built for harsh environments with an operating temperature range of -40°C to +85°C and compliance with industrial vibration and shock standards.
- Enhanced ESD Protection: Meets EN61000-4-2 standards with ±15kV air and ±8kV contact electrostatic discharge protection.
- Durable Gold-Plated Contacts: 30 micro-inch gold finger plating ensures long-term reliability and corrosion resistance.
- Long-Term Reliability: Backed by a 3-year manufacturer warranty and designed, manufactured, and tested in Taiwan under strict quality control.
- PCI Express 2.0 Compliance: Fully compliant with PCIe 2.0 x1 interface, ensuring high-speed data throughput and compatibility with modern embedded systems.
- High Data Rate Capability: Supports serial data rates from 4,800 bps up to 3 Mbps (RS-232 up to 921.6 Kbps), suitable for a wide range of industrial communication protocols.
- 16C550 Compatible UART: Incorporates 16C550-compatible UART controllers with 256-byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Flexible Connector Orientation: Available in two mechanical configurations—vertical (EGP2-X401-W1) and horizontal (EGP2-X401-W2)—to accommodate different system layouts.
- Full RS-232 Functionality: Supports all standard RS-232 control signals through DB9 connectors, ensuring compatibility with legacy and modern serial devices.
- Hardware Termination Control: DIP switch selectable termination resistors for RS-422/485 modes, allowing optimized signal integrity in various network topologies.
- Industrial-Grade Design: Built for harsh environments with an operating temperature range of -40°C to +85°C and compliance with industrial vibration and shock standards.
- Enhanced ESD Protection: Meets EN61000-4-2 standards with ±15kV air and ±8kV contact electrostatic discharge protection.
- Durable Gold-Plated Contacts: 30 micro-inch gold finger plating ensures long-term reliability and corrosion resistance.
- Long-Term Reliability: Backed by a 3-year manufacturer warranty and designed, manufactured, and tested in Taiwan under strict quality control.
Comprehensive Product Summary: Innodisk EGP2-X401-W1-A71 – M.2 to Four RS-232/422/485 Module
### 1. Product Overview
Product Name: M.2 to Four RS-232/422/485 Module
Model: EGP2-X401-W1-A71
Series: EGP2-X401
Article Number: EGP2-X401-W1-A71
Manufacturer: Innodisk Corporation
Product Type: M.2 2242 B-M form-factor expansion module for serial communication
Product Category: Industrial-grade serial communication interface module
The Innodisk EGP2-X401-W1-A71 is a compact, high-performance M.2 interface module designed to expand system connectivity by providing four independent serial communication ports configurable as RS-232, RS-422, or RS-485. Engineered for industrial and embedded applications, this module integrates robust electrical protection, wide temperature tolerance, and flexible configuration options, making it suitable for mission-critical environments requiring reliable serial communication over PCI Express (PCIe) 2.0.
### 2. Key Features
- Multi-Protocol Serial Support: Provides four independent serial ports configurable via software for RS-232, RS-422, or RS-485 communication modes.
- PCI Express 2.0 Compliance: Fully compliant with PCIe 2.0 x1 interface, ensuring high-speed data throughput and compatibility with modern embedded systems.
- High Data Rate Capability: Supports serial data rates from 4,800 bps up to 3 Mbps (RS-232 up to 921.6 Kbps), suitable for a wide range of industrial communication protocols.
- 16C550 Compatible UART: Incorporates 16C550-compatible UART controllers with 256-byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Flexible Connector Orientation: Available in two mechanical configurations—vertical (EGP2-X401-W1) and horizontal (EGP2-X401-W2)—to accommodate different system layouts.
- Full RS-232 Functionality: Supports all standard RS-232 control signals through DB9 connectors, ensuring compatibility with legacy and modern serial devices.
- Hardware Termination Control: DIP switch selectable termination resistors for RS-422/485 modes, allowing optimized signal integrity in various network topologies.
- Industrial-Grade Design: Built for harsh environments with an operating temperature range of -40°C to +85°C and compliance with industrial vibration and shock standards.
- Enhanced ESD Protection: Meets EN61000-4-2 standards with ±15kV air and ±8kV contact electrostatic discharge protection.
- Durable Gold-Plated Contacts: 30 micro-inch gold finger plating ensures long-term reliability and corrosion resistance.
- Long-Term Reliability: Backed by a 3-year manufacturer warranty and designed, manufactured, and tested in Taiwan under strict quality control.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Form Factor | M.2 2242 B-M |
| Interface (Input) | PCI Express 2.0 x1 |
| Interface (Output) | Four configurable RS-232/422/485 ports |
| Output Connector Type | DB9 x 4 |
| Maximum Power Consumption (TDP) | 0.58 W (3.3V x 176 mA) |
| Dimensions (W x L x H) | Vertical: 22 x 42 x 6.45 mm<br>Horizontal: 22 x 42 x 7.65 mm |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +95°C |
| Vibration Resistance | 5G @ 7–2000 Hz |
| Shock Resistance | 50G @ 0.5 ms |
| ESD Protection | EN61000-4-2 compliant (Air: ±15kV, Contact: ±8kV) |
| Serial Data Rate | 4,800 bps to 3 Mbps (RS-232 up to 921.6 Kbps) |
| UART Compatibility | 16C550 compatible with 256-byte FIFO |
| Termination Control | DIP switch selectable (enabled/disabled) |
| Gold Finger Plating | 30 micro-inch |
| Warranty | 3 years |
| Country of Manufacture | Taiwan |
### 4. Functionality
The EGP2-X401-W1-A71 functions as a serial communication expansion module that connects to a host system via an M.2 2242 B-M slot supporting PCIe 2.0 x1 signaling. Once installed, it provides four independent serial communication channels that can be configured through software to operate in RS-232, RS-422, or RS-485 modes.
Each port supports full-duplex or half-duplex communication depending on the selected mode. The module’s integrated UART controllers manage data buffering and flow control, ensuring stable and efficient data transmission even under high-load conditions.
Use Cases and Applications:
- Industrial automation and control systems
- Embedded computing platforms and IoT gateways
- Machine-to-machine (M2M) communication
- Point-of-sale (POS) terminals and kiosks
- Transportation and logistics systems
- Data acquisition and instrumentation
- Legacy equipment integration in modern systems
Compatibility:
- Operating Systems:
- Windows XP (32-bit), Windows 7/8/8.1/10 (32/64-bit), Windows Embedded Standard 7 (WES7), Windows CE 7.0
- Linux Kernel 2.6.x and above (source code available for customization)
- Hardware Platforms: Compatible with embedded PCs, industrial motherboards, and systems featuring M.2 2242 B-M slots supporting PCIe x1 lanes.
### 5. Components & Accessories
Included Items:
- EGP2-X401-W1-A71 module (vertical connector configuration)
- Four DB9 connectors integrated on the module for serial output
- DIP switch for termination resistor configuration
- Documentation and driver download instructions (available via MyInnodisk portal)
Optional Accessories:
- EGP2-X401-W2 variant (horizontal connector configuration) for alternative mechanical integration
- Serial communication cables (DB9 male/female)
- Mounting screws or standoffs (depending on system chassis design)
Connectors and Pin Definitions:
| Pin | RS-232 | RS-422 (Full Duplex) | RS-485 (Half Duplex) |
|----------|-------------|--------------------------|---------------------------|
| 1 | DCD | TX– | D– |
| 2 | RX | TX+ | D+ |
| 3 | TX | RX+ | — |
| 4 | DTR | RX– | — |
| 5 | GND | GND | GND |
| 6 | DSR | — | — |
| 7 | RTS | — | — |
| 8 | CTS | — | — |
| 9 | RI | — | — |
DIP Switch Settings:
- OFF: Normal operation (termination disabled)
- ON: Termination enabled (for RS-422/485 modes)
### 6. Installation & Setup
System Requirements:
- Host system with an available M.2 2242 B-M slot supporting PCIe 2.0 x1 interface
- Compatible operating system (Windows or Linux as listed above)
- Administrative privileges for driver installation
Installation Procedure:
1. Power off the host system and disconnect it from power sources.
2. Insert the EGP2-X401-W1-A71 module into the M.2 2242 B-M slot, ensuring proper alignment of the gold fingers.
3. Secure the module using the appropriate screw or standoff.
4. Connect serial devices to the DB9 connectors as required.
5. Configure DIP switches for termination if using RS-422/485 networks.
6. Power on the system and install the appropriate driver from the MyInnodisk website.
7. Use the provided software utility or operating system device manager to configure each port’s communication mode and parameters.
Mounting Options:
- Vertical connector (W1) for systems with limited horizontal clearance
- Horizontal connector (W2) for low-profile or space-constrained designs
Configuration:
- Software-based mode selection (RS-232/422/485)
- DIP switch hardware configuration for termination resistors
### 7. Performance & Capabilities
Data Throughput:
- RS-232: Up to 921.6 Kbps
- RS-422/485: Up to 3 Mbps
Efficiency and Reliability:
The 16C550-compatible UART architecture with 256-byte FIFOs minimizes CPU load and ensures smooth data flow even under high-speed communication. The module’s low power consumption (0.58 W) makes it ideal for embedded and fanless systems where energy efficiency is critical.
Environmental Robustness:
Designed for industrial-grade reliability, the EGP2-X401-W1-A71 operates reliably across a wide temperature range (-40°C to +85°C) and withstands vibration (5G) and shock (50G) conditions typical of industrial and transportation environments.
Limitations:
- Requires host systems with PCIe-enabled M.2 slots (not compatible with SATA-only M.2 interfaces).
- External cabling and DB9 connectors may require additional space in compact enclosures.
### 8. Standards & Compliance
Electrical and Safety Compliance:
- PCI Express 2.0 Specification: Ensures interoperability with standard PCIe-based systems.
- EN61000-4-2 (ESD Protection):
- Air Discharge: ±15 kV
- Contact Discharge: ±8 kV
Environmental and Mechanical Standards:
- Vibration: 5G @ 7–2000 Hz
- Shock: 50G @ 0.5 ms
- Operating Temperature: -40°C to +85°C (wide temperature range)
- Storage Temperature: -55°C to +95°C
Manufacturing and Quality Assurance:
- Designed and manufactured in Taiwan under Innodisk’s ISO-certified production facilities.
- Industrial-grade components ensure long-term reliability and consistent performance.
Regulatory Compliance:
- RoHS compliant (lead-free manufacturing)
- CE and FCC compliance (typical for Innodisk industrial modules)
### 9. Additional Information
Warranty:
- 3-year limited warranty covering manufacturing defects and performance reliability under normal operating conditions.
Support and Maintenance:
- Technical support available through Innodisk’s global offices and online support portal.
- Firmware and driver updates accessible via the MyInnodisk website.
- Linux source code available for customization to specific kernel versions or embedded distributions.
Product Variants:
- EGP2-X401-W1: Vertical connector, wide temperature version (standard model).
- EGP2-X401-W2: Horizontal connector, wide temperature version (alternative mechanical layout).
Manufacturer Contact Information:
- Headquarters (Taiwan):
5F., No. 237, Sec. 1, Datong Rd., Xizhi Dist., New Taipei City 221, Taiwan
Tel: +886-2-7703-3000
Email: sales@innodisk.com
- Regional Offices:
- USA: usasales@innodisk.com | +1-510-770-9421
- Europe: eusales@innodisk.com | +31-40-3045-400
- Japan: jpsales@innodisk.com | +81-3-6667-0161
- China: sales_cn@innodisk.com | +86-755-2167-3689
Website: [www.innodisk.com](http://www.innodisk.com)
Document Revision: December 24, 2019
Copyright: © 2018 Innodisk Corporation. All rights reserved. Specifications subject to change without prior notice.
### Summary
The Innodisk EGP2-X401-W1-A71 is a robust, industrial-grade M.2 2242 expansion module that delivers four configurable serial communication ports supporting RS-232, RS-422, and RS-485 standards. With PCIe 2.0 compliance, wide temperature operation, and advanced ESD protection, it is engineered for demanding embedded and industrial applications requiring reliable, high-speed serial connectivity.
Its compact design, flexible connector orientation, and software-configurable modes make it an ideal solution for system integrators and OEMs seeking to add multi-protocol serial interfaces to space-constrained embedded systems. The combination of industrial durability, low power consumption, and long-term support underscores Innodisk’s commitment to quality and reliability in industrial computing solutions.
### 1. Product Overview
Product Name: M.2 to Four RS-232/422/485 Module
Model: EGP2-X401-W1-A71
Series: EGP2-X401
Article Number: EGP2-X401-W1-A71
Manufacturer: Innodisk Corporation
Product Type: M.2 2242 B-M form-factor expansion module for serial communication
Product Category: Industrial-grade serial communication interface module
The Innodisk EGP2-X401-W1-A71 is a compact, high-performance M.2 interface module designed to expand system connectivity by providing four independent serial communication ports configurable as RS-232, RS-422, or RS-485. Engineered for industrial and embedded applications, this module integrates robust electrical protection, wide temperature tolerance, and flexible configuration options, making it suitable for mission-critical environments requiring reliable serial communication over PCI Express (PCIe) 2.0.
### 2. Key Features
- Multi-Protocol Serial Support: Provides four independent serial ports configurable via software for RS-232, RS-422, or RS-485 communication modes.
- PCI Express 2.0 Compliance: Fully compliant with PCIe 2.0 x1 interface, ensuring high-speed data throughput and compatibility with modern embedded systems.
- High Data Rate Capability: Supports serial data rates from 4,800 bps up to 3 Mbps (RS-232 up to 921.6 Kbps), suitable for a wide range of industrial communication protocols.
- 16C550 Compatible UART: Incorporates 16C550-compatible UART controllers with 256-byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Flexible Connector Orientation: Available in two mechanical configurations—vertical (EGP2-X401-W1) and horizontal (EGP2-X401-W2)—to accommodate different system layouts.
- Full RS-232 Functionality: Supports all standard RS-232 control signals through DB9 connectors, ensuring compatibility with legacy and modern serial devices.
- Hardware Termination Control: DIP switch selectable termination resistors for RS-422/485 modes, allowing optimized signal integrity in various network topologies.
- Industrial-Grade Design: Built for harsh environments with an operating temperature range of -40°C to +85°C and compliance with industrial vibration and shock standards.
- Enhanced ESD Protection: Meets EN61000-4-2 standards with ±15kV air and ±8kV contact electrostatic discharge protection.
- Durable Gold-Plated Contacts: 30 micro-inch gold finger plating ensures long-term reliability and corrosion resistance.
- Long-Term Reliability: Backed by a 3-year manufacturer warranty and designed, manufactured, and tested in Taiwan under strict quality control.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Form Factor | M.2 2242 B-M |
| Interface (Input) | PCI Express 2.0 x1 |
| Interface (Output) | Four configurable RS-232/422/485 ports |
| Output Connector Type | DB9 x 4 |
| Maximum Power Consumption (TDP) | 0.58 W (3.3V x 176 mA) |
| Dimensions (W x L x H) | Vertical: 22 x 42 x 6.45 mm<br>Horizontal: 22 x 42 x 7.65 mm |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +95°C |
| Vibration Resistance | 5G @ 7–2000 Hz |
| Shock Resistance | 50G @ 0.5 ms |
| ESD Protection | EN61000-4-2 compliant (Air: ±15kV, Contact: ±8kV) |
| Serial Data Rate | 4,800 bps to 3 Mbps (RS-232 up to 921.6 Kbps) |
| UART Compatibility | 16C550 compatible with 256-byte FIFO |
| Termination Control | DIP switch selectable (enabled/disabled) |
| Gold Finger Plating | 30 micro-inch |
| Warranty | 3 years |
| Country of Manufacture | Taiwan |
### 4. Functionality
The EGP2-X401-W1-A71 functions as a serial communication expansion module that connects to a host system via an M.2 2242 B-M slot supporting PCIe 2.0 x1 signaling. Once installed, it provides four independent serial communication channels that can be configured through software to operate in RS-232, RS-422, or RS-485 modes.
Each port supports full-duplex or half-duplex communication depending on the selected mode. The module’s integrated UART controllers manage data buffering and flow control, ensuring stable and efficient data transmission even under high-load conditions.
Use Cases and Applications:
- Industrial automation and control systems
- Embedded computing platforms and IoT gateways
- Machine-to-machine (M2M) communication
- Point-of-sale (POS) terminals and kiosks
- Transportation and logistics systems
- Data acquisition and instrumentation
- Legacy equipment integration in modern systems
Compatibility:
- Operating Systems:
- Windows XP (32-bit), Windows 7/8/8.1/10 (32/64-bit), Windows Embedded Standard 7 (WES7), Windows CE 7.0
- Linux Kernel 2.6.x and above (source code available for customization)
- Hardware Platforms: Compatible with embedded PCs, industrial motherboards, and systems featuring M.2 2242 B-M slots supporting PCIe x1 lanes.
### 5. Components & Accessories
Included Items:
- EGP2-X401-W1-A71 module (vertical connector configuration)
- Four DB9 connectors integrated on the module for serial output
- DIP switch for termination resistor configuration
- Documentation and driver download instructions (available via MyInnodisk portal)
Optional Accessories:
- EGP2-X401-W2 variant (horizontal connector configuration) for alternative mechanical integration
- Serial communication cables (DB9 male/female)
- Mounting screws or standoffs (depending on system chassis design)
Connectors and Pin Definitions:
| Pin | RS-232 | RS-422 (Full Duplex) | RS-485 (Half Duplex) |
|----------|-------------|--------------------------|---------------------------|
| 1 | DCD | TX– | D– |
| 2 | RX | TX+ | D+ |
| 3 | TX | RX+ | — |
| 4 | DTR | RX– | — |
| 5 | GND | GND | GND |
| 6 | DSR | — | — |
| 7 | RTS | — | — |
| 8 | CTS | — | — |
| 9 | RI | — | — |
DIP Switch Settings:
- OFF: Normal operation (termination disabled)
- ON: Termination enabled (for RS-422/485 modes)
### 6. Installation & Setup
System Requirements:
- Host system with an available M.2 2242 B-M slot supporting PCIe 2.0 x1 interface
- Compatible operating system (Windows or Linux as listed above)
- Administrative privileges for driver installation
Installation Procedure:
1. Power off the host system and disconnect it from power sources.
2. Insert the EGP2-X401-W1-A71 module into the M.2 2242 B-M slot, ensuring proper alignment of the gold fingers.
3. Secure the module using the appropriate screw or standoff.
4. Connect serial devices to the DB9 connectors as required.
5. Configure DIP switches for termination if using RS-422/485 networks.
6. Power on the system and install the appropriate driver from the MyInnodisk website.
7. Use the provided software utility or operating system device manager to configure each port’s communication mode and parameters.
Mounting Options:
- Vertical connector (W1) for systems with limited horizontal clearance
- Horizontal connector (W2) for low-profile or space-constrained designs
Configuration:
- Software-based mode selection (RS-232/422/485)
- DIP switch hardware configuration for termination resistors
### 7. Performance & Capabilities
Data Throughput:
- RS-232: Up to 921.6 Kbps
- RS-422/485: Up to 3 Mbps
Efficiency and Reliability:
The 16C550-compatible UART architecture with 256-byte FIFOs minimizes CPU load and ensures smooth data flow even under high-speed communication. The module’s low power consumption (0.58 W) makes it ideal for embedded and fanless systems where energy efficiency is critical.
Environmental Robustness:
Designed for industrial-grade reliability, the EGP2-X401-W1-A71 operates reliably across a wide temperature range (-40°C to +85°C) and withstands vibration (5G) and shock (50G) conditions typical of industrial and transportation environments.
Limitations:
- Requires host systems with PCIe-enabled M.2 slots (not compatible with SATA-only M.2 interfaces).
- External cabling and DB9 connectors may require additional space in compact enclosures.
### 8. Standards & Compliance
Electrical and Safety Compliance:
- PCI Express 2.0 Specification: Ensures interoperability with standard PCIe-based systems.
- EN61000-4-2 (ESD Protection):
- Air Discharge: ±15 kV
- Contact Discharge: ±8 kV
Environmental and Mechanical Standards:
- Vibration: 5G @ 7–2000 Hz
- Shock: 50G @ 0.5 ms
- Operating Temperature: -40°C to +85°C (wide temperature range)
- Storage Temperature: -55°C to +95°C
Manufacturing and Quality Assurance:
- Designed and manufactured in Taiwan under Innodisk’s ISO-certified production facilities.
- Industrial-grade components ensure long-term reliability and consistent performance.
Regulatory Compliance:
- RoHS compliant (lead-free manufacturing)
- CE and FCC compliance (typical for Innodisk industrial modules)
### 9. Additional Information
Warranty:
- 3-year limited warranty covering manufacturing defects and performance reliability under normal operating conditions.
Support and Maintenance:
- Technical support available through Innodisk’s global offices and online support portal.
- Firmware and driver updates accessible via the MyInnodisk website.
- Linux source code available for customization to specific kernel versions or embedded distributions.
Product Variants:
- EGP2-X401-W1: Vertical connector, wide temperature version (standard model).
- EGP2-X401-W2: Horizontal connector, wide temperature version (alternative mechanical layout).
Manufacturer Contact Information:
- Headquarters (Taiwan):
5F., No. 237, Sec. 1, Datong Rd., Xizhi Dist., New Taipei City 221, Taiwan
Tel: +886-2-7703-3000
Email: sales@innodisk.com
- Regional Offices:
- USA: usasales@innodisk.com | +1-510-770-9421
- Europe: eusales@innodisk.com | +31-40-3045-400
- Japan: jpsales@innodisk.com | +81-3-6667-0161
- China: sales_cn@innodisk.com | +86-755-2167-3689
Website: [www.innodisk.com](http://www.innodisk.com)
Document Revision: December 24, 2019
Copyright: © 2018 Innodisk Corporation. All rights reserved. Specifications subject to change without prior notice.
### Summary
The Innodisk EGP2-X401-W1-A71 is a robust, industrial-grade M.2 2242 expansion module that delivers four configurable serial communication ports supporting RS-232, RS-422, and RS-485 standards. With PCIe 2.0 compliance, wide temperature operation, and advanced ESD protection, it is engineered for demanding embedded and industrial applications requiring reliable, high-speed serial connectivity.
Its compact design, flexible connector orientation, and software-configurable modes make it an ideal solution for system integrators and OEMs seeking to add multi-protocol serial interfaces to space-constrained embedded systems. The combination of industrial durability, low power consumption, and long-term support underscores Innodisk’s commitment to quality and reliability in industrial computing solutions.
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